A programmer, if we use US standards is probably $8000 per month. If you can get 30% more value out of that programmer (trust me, its WAY more then 30%), you gained $2400 of value. If you pay $200, $500, $1000 for that, its still a net positive. Ignoring the salary range of a actual senior...

LLMs do not result in bosses firing people, it results in more projects / faster completed projects, what in turn means more $$$ for a company.